CN107143624B - A kind of seven speed automatic transmissions - Google Patents

Abstract

Seven speed automatic transmissions of one kind of the invention, it is by 3 planetary gear set, that is, first planetary gear sets (PG1), the second planetary gear set (PG2), third planet gear set (PG3) and i.e. the first brake of 5 shifting elements (B1), second brake (B2), first clutch (C1), second clutch (C2), third clutch (C3)), seven speed automatic transmission cabinets (0), the first axle (1) of seven speed automatic transmissions, seven speed automatic transmissions the second axis (2) form；The effect of 3 planetary gear sets composition is so that speed changer entirety axial length shortens, and overall compact, and the connection type of three planetary gear sets is simple, manufacture and assembly are easy.7 forward gears can be realized by 5 shifting elements and 1 reverses gear, the shift between gear is all simply to shift gears, i.e., adjacent gear shift need to only control a shifting element and engage a shifting element separately, and shift process is more smooth.

Description

A kind of seven speed automatic transmissions

Technical field

The present invention provides a kind of seven speed automatic transmissions, it is a kind of seven speed automatic transmission of planetary gear construction, is related to It is a kind of be suitble to passenger car can power shifting automatic transmission, as a kind of actuating unit especially suitable for preposition Forerunner's type passenger vehicle.Belong to car transmissions technical field.

Background technique

To improve the fuel economy of vehicle and promoting its driving performance, the gear number of passenger car automatic transmission is not It is disconnected to increase.In passenger car field, the arrangement of automatic transmission (AT) has using longitudinal arrangement (after preposition Drive type vehicle), also have using horizontal arrangement (being applied to preposition forerunner's type vehicle), also has using in-line arrangement (applied to being driven after postposition).Automatic transmission is made of all gear sets planet row, also has gear set by planet What row and spur gear group formed.

Patent CN103470704A just describe it is such a can power shifting more gear automatic transmission, in cabinet There are two shafting, three planet rows, three pairs of roller gears, four clutches and a brakes.The arrangement of first planet is set First axle is fastened, and other two planet row is arranged in the second shafting, and three pairs of roller gears are arranged in two shaftings, as a result, The speed changer can increase radial dimension and be substantially reduced axial dimension, particularly suitable for preposition transversal arrangement.The speed changer Eight forward gears are realized with five shifting elements and one reverses gear, and the switching between adjacent gear only needs to change a shift Element.Its shortcomings that, is: two shaftings are used, the variator efficiency relative to the single shafting of use is lower, and due to Its three pairs of gears and three planet rows, cause the difficult arrangement of oil circuit.

Patent CN105114561A equally describe it is a kind of can power shifting more gear automatic transmission, in a shafting Upper arrangement four planetary gear sets, three brakes and three clutches.This seven shift original parts of clutch and brake can be former Then property by operation to realize that nine forward gears and one are reversed gear.The speed changer has as follows a little: it is known that fluid drive Device gear is more, more advantageous to the fuel economy and dynamic property of vehicle, therefore it can effectively improve these two aspects performance.It is lacked Point is: the connection type of four planet rows is too complicated, in addition its more component causes higher manufacturing cost, and the program It is unable to satisfy demand of the speed changer to hybrid power, can not find the suitable position of connection motor.

Patent CN105299174A equally describe it is a kind of can power shifting more gear automatic transmission, have in cabinet One shafting, four planetary gear sets, three clutches and four brakes.It can by the closure of control clutch and brake To realize that seven forward gears and one reverse gear.Well known to week, automatic transmission has more gears, in power performance and oil consumption Aspect is more advantageous, and current domestic automatic transmission is still kept off with four, based on five gears, and seven shift transmissions can be improved vehicle Fuel economy and promote its driving performance.However, its shortcomings that, is: according to patent, the connection side of four groups of planet rows Formula is complicated, increases manufacturing cost and assembly difficulty, simultaneously because its shifting element is by three clutches and four brakes Composition, only there are two shifting elements to be closed for each gear, and five shifting elements are in the open state, increase idling loss.And And the patent formula cannot find the most suitable position of a connection motor, meet seven speed automatic transmissions and want to hybrid power It asks.

Summary of the invention

(1) goal of the invention

The present invention precisely in order to comply with the demand and require and propose.The technical problems to be solved by the present invention are: A kind of seven speed automatic transmissions for preposition precursor vehicle, use planetary gear set as few as possible and shifting element are provided, Axial length to guarantee seven speed automatic transmission is as short as possible, compact-sized, high-efficient, and can find a connection The most suitable position of motor meets requirement of seven speed automatic transmission to hybrid power.

(2) technical solution

To solve the above problems, the technical scheme adopted by the invention is that:

The present invention provides a kind of seven speed automatic transmissions, is by 3 planetary gear sets (first planetary gear set (PG1), the Two planetary gear sets (PG2), third planet gear set (PG3)) and 5 shifting elements (the first brakes (B1), second brake (B2), first clutch (C1), second clutch (C2), third clutch (C3)), seven speed automatic transmission cabinets (0), seven gear The first axle (1) of automatic transmission, the second axis (2) of seven speed automatic transmissions form；In addition to illustrating power via seven gears There are also input shafts (Input), fluid torque-converter (TC), poor for the route that automatic transmission is transmitted, Fig. 1 and element shown in Fig. 2 Fast device two sides output end (Output), motor (TM), the 0th clutch (C0)；Their mutual relationships are: 3 planet teeth Wheel group, 5 shifting elements, the first axle (1) of seven speed automatic transmissions, seven speed automatic transmissions the second axis (2) be arranged in this In seven speed automatic transmission cabinets (0), the fluid torque-converter (TC) shown in FIG. 1 is arranged in input shaft (Input) and seven gear It is connected between the first axle (1) of automatic transmission and with them；0th clutch (C0) shown in Fig. 2 is arranged in the input shaft (Input) it is connected between the first axle of seven speed automatic transmission (1) and with them；The motor (TM) and seven shown in Fig. 2 The first axle (1) of speed automatic transmission is connected；Their shape design is: the seven speed automatic transmissions cabinet (0), seven gears are automatic The first axle (1) of speed changer, the second axis (2) of seven speed automatic transmissions, input shaft (Input), differential mechanism two sides output end (Output), the shape design of fluid torque-converter (TC), motor (TM) and the 0th clutch (C0) is: their design parameter and Size matched arrangement corresponding to seven speed automatic transmission and whole vehicle functions require to determine；Wherein the fluid power becomes Square device (TC) selects the fluid torque-converter with blocking function to be used to reduce hydraulic losses brought by it；Motor TM is straight The electric automotive of the types such as galvanic electricity motivation, AC three-phase inductive motor, switched reluctance motor or permanent magnet brushless electromotor Machine；0th clutch (C0) is multiple-piece wet friction clutch, multiple-piece wet friction clutch be on a kind of automobile often Clutch, it includes multiple groups antithesis piece and friction plates, and transmitting torque is realized by combination selective between them Effect；

3 planets are by first planetary gear set (PG1), the second planetary gear set (PG2) and third planet gear set (PG3) it forms, their correlation is: first planetary gear set (PG1), the second planetary gear set (PG2), third planet tooth Wheel group (PG3) is successively in the laterally spaced first axle (1) for being arranged in seven speed automatic transmission；

The first planetary gear set (PG1) includes the first sun gear (S1), the first gear ring (R1) and first planet carrier (A1), second planetary gear set (PG2) includes the second sun gear (S2), the second gear ring (R2) and the second planet carrier (A2), The third planet gear set (PG3) includes third sun gear (S3), third gear ring (R3) and third planet carrier (A3), their phases Relationship between mutually is: the longitudinally spaced arrangement of gear ring, planet carrier, sun gear of each planetary gear set, the first sun gear (S1) it is fixed in the first axle (1) of seven speed automatic transmissions, the second sun gear (S2) is placed in the of seven speed automatic transmissions On one axis (1), third sun gear (S3) is placed in the first axle (1) of seven speed automatic transmissions；Their shape design is: it The characteristic parameters of each planetary gear set of design parameter and size seven speed automatic transmissions described in final design determine； Wherein, the first sun gear (S1), the second sun gear (S2), third sun gear (S3) are externally-engaged cylindrical gear；First gear ring (R1), the second gear ring (R2), third gear ring (R3) are internal spur gear；First planet carrier (A1), third planet carrier (A3) The space support frame of connecting plate composition for both side plate and therebetween, is disposed with planet wheel spindle and bearing etc. on both side plate；The Two planet carriers (A2) be unilateral board group at braced frame, planet wheel spindle and bearing etc. are disposed on side plate；

5 shifting elements by the first brake (B1), second brake (B2), first clutch (C1), second from Clutch (C2), third clutch (C3) composition；Their mutual relationships are: the first brake (B1) connects first planet carrier (A1) and seven speed automatic transmission cabinets (0)；Second brake (B2) connects third sun gear (S3) and seven speed automatic transmissions Cabinet (0)；First clutch (C1) connects the second planet carrier (A2) and third sun gear (S3)；Second clutch (C2) connection the One gear ring (R1) and third planet carrier (A3)；Third clutch (C3) connects the first gear ring (R1) and the second planet carrier (A2)；It Shape design be: first clutch (C1), second clutch (C2), third clutch (C3) are multiple-piece wet frictions Clutch, multiple-piece wet friction clutch are common clutches on a kind of automobile, it includes multiple groups antithesis piece and friction plate, The effect of transmitting torque is realized by combination selective between them；First brake (B1), second brake (B2) are equal It is multiple-piece wet friction brake, multiple-piece wet friction brake is common brake on a kind of automobile, and it includes more Group antithesis piece and friction plate realize the effect for stopping transmitting torque by combination selective between them；Certainly, of the invention In Clutch and brake can use it is other in addition to multiple-piece wet friction clutch, multiple-piece wet friction brake The shifting element of form can also be used, and organization plan is in claims of the invention；

Power is via the route that seven speed automatic transmission is transmitted: the power is from input shaft (Input) via Fig. 1 Shown in the fluid torque-converter (TC) or motor shown in Fig. 2 (TM) input, finally exported by third gear ring (R3) to differential mechanism Two sides output end (Output) is transferred to the driving wheel for being equipped with the preposition precursor vehicle of seven speed automatic transmission；

It is closed by second brake (B2), first clutch (C1), second clutch (C2), the first brake (B1), Third clutch (C3) is opened, which becomes a gear speed ratio；Pass through the first brake (B1), second brake (B2), second clutch (C2) is closed, and first clutch (C1), third clutch (C3) are opened, which becomes two Keep off speed ratio；Pass through second brake (B2), second clutch (C2), third clutch (C3) closure, the first brake (B1), the One clutch (C1) is opened, which becomes three gear speed ratios；By the first brake (B1), second brake (B2), Third clutch (C3) closure, first clutch (C1), second clutch (C2) are opened, which becomes four gears speed Than；By second brake (B2), first clutch (C1), third clutch (C3) closure, the first brake (B1), second from Clutch (C2) is opened, which becomes five gear speed ratios；Pass through the first brake (B1), first clutch (C1), third Clutch (C3) closure, second brake (B2), second clutch (C2) are opened, which becomes six gear speed ratios；It is logical Cross first clutch (C1), second clutch (C2), third clutch (C3) closure, the first brake (B1), second brake (B2) it opens, which becomes seven gear speed ratios；Pass through the first brake (B1), second brake (B2), the first clutch Device (C1) closure, second clutch (C2), third clutch (C3) are opened, which becomes reverse speed ratio；

By aforementioned, which can obtain seven forward gears and one reverses gear, and seven gear automatic speed changing There are three shifting elements to be closed for each gear of device, and two shifting elements are opened；In its shift logic, changing between adjacent gear Keep off all simple shifts, i.e., in shift process only one shifting element by be closed into open, another shifting element by It is opened to closure.

(3) advantage and effect

The invention adopts the above technical scheme, has the advantage that

1: the gear set of the technical program is only made of 3 planetary gears, so that speed changer entirety axial length shortens, it is whole Body is compact.And the connection type of three planetary gear sets is simple, and manufacture and assembly are easy.

2: 7 forward gears can be realized by 5 shifting elements for the technical program and 1 reverses gear, and each gear is by three Shifting element closure realizes that only there are two shifting elements to open, and reduces idling loss.

3: the shift between all adjacent gears of seven speed automatic transmission is all simply to shift gears.I.e. adjacent gear changes Gear need to only control a shifting element and engage a shifting element separately, and shift process is more smooth.

4: seven speed automatic transmission can easily become hybrid transmissions, as a kind of scheme, motor (TM) replace fluid torque-converter (TC), while integrating a multidisc clutch (the 0th clutch (C0)), to form parallel connection Formula hybrid power system.When vehicle start or when running at a low speed, motor (TM) operation, engine does not work, and opens the 0th clutch Device (C0) disconnects engine and is connected by power with drive system；When vehicle demand power is higher, the 0th clutch (C0) of closure is whole Vehicle can be by engine and motor while output power；When vehicle driving-cycle is suitble to engine to work independently, closure the 0th Clutch (C0) is closed motor (TM), and vehicle is operated alone in engine；When battery capacity is lower, by being closed the 0th clutch Device (C0), the output power of engine are used to drive vehicle and by motor (TM) to cell power generation simultaneously, or in parking operating condition Under, the output power of engine is used to charge the battery by motor (TM)；In addition this mixed power plant can realize starting hair Motivational function and Brake Energy recycling.

Detailed description of the invention

Present invention will be further explained below with reference to the attached drawings and examples.

Fig. 1 is the structural schematic diagram of seven speed automatic transmissions first embodiment of the present invention.

Fig. 2 is the structural schematic diagram of seven speed automatic transmissions second embodiment of the present invention.

Fig. 3 is the shift logic figure of seven speed automatic transmission of the present invention.

Unit catalog in figure

Specific embodiment

Embodiment is for further illustrating technical concept of the invention, without limiting the scope of the invention.

First embodiment:

The present invention provides a kind of seven speed automatic transmissions as shown in Figure 1:, and seven forward gears may be implemented and one reverses gear, It is changed by 3 planetary gear sets (first planetary gear set PG1, the second planetary gear set PG2, third planet gear set PG3) and 5 Keep off element (the first brake B1, second brake B1, first clutch C1, second clutch C2, third clutch C3), seven gears Automatic transmission cabinet 0, the first axle 1 of seven speed automatic transmissions, seven speed automatic transmissions the second axis 2 composition, in addition to Illustrate the route that power is transmitted via seven speed automatic transmissions, there are also input shaft Input, hydraulic moment changeable for element shown in FIG. 1 Device TC, differential mechanism two sides output end Output；Their mutual relationships are: 3 planetary gear sets, 5 shifting elements, seven The first axle 1 of speed automatic transmission, the second axis 2 of seven speed automatic transmissions are arranged in seven speed automatic transmission cabinets 0, fluid power Torque-converters TC is arranged between input shaft Input and the first axle 1 of seven speed automatic transmissions and is connected with them；Their shape Construction is: the seven speed automatic transmissions cabinet 0, the first axle 1 of seven speed automatic transmissions, seven speed automatic transmissions the second axis 2, input shaft Input, differential mechanism two sides output end Out put, fluid torque-converter TC shape design be: their design parameter It requires to determine with size matched arrangement corresponding to seven speed automatic transmission and whole vehicle functions, wherein seven gears Automatic transmission cabinet 0 is complicated thin wall metal parts, is in box-shaped, and surface has many places working position, such as axis Hole, screw connecting hole and various mounting planes etc. are cut in bearing bore, fork shaft hole, positioning, and aluminium alloy etc. can be selected in material；Seven gears are automatic The first axle 1 of speed changer, the second axis 2 of seven speed automatic transmissions, input shaft Input, differential mechanism two sides output end Output are The form of multi-diameter shaft can be used in axial workpiece, can arrange that steel alloy etc. can be selected in spline, material thereon, can return through carburizing and quenching Fire processing；Fluid torque-converter TC selects the fluid torque-converter with blocking function to be used to reduce hydraulic losses brought by it；

3 planetary gear sets are by first planetary gear set PG1, the second planetary gear set PG2, third planet gear set PG3 composition；Their mutual relationships are: first planetary gear set PG1, the second planetary gear set PG2, third planet gear Group PG3 is successively in the laterally spaced first axle 1 for being arranged in seven speed automatic transmissions；

The first planetary gear set PG1 includes the first sun gear S1, the first gear ring R1 and first planet carrier A1, and described the Two planetary gear set PG2 include the second sun gear S2, the second gear ring R2 and the second planet carrier A2, the third planet gear set PG3 includes third sun gear S3, third gear ring R3 and third planet carrier A3, their mutual relationships are: each planet tooth The longitudinally spaced arrangement of gear ring, planet carrier, sun gear of wheel group, the first sun gear S1 are fixed on the first of seven speed automatic transmissions On axis 1, the second sun gear S2 is placed in the first axle 1 of seven speed automatic transmissions, and it is automatic that third sun gear S3 is placed in seven gears In the first axle 1 of speed changer；The gear ring of each planetary gear set, planet carrier, the method for sun gear as shown in Figure 1 carry out corresponding Engagement connection, and first planet carrier A1 is connected with the second gear ring R2, and the second sun gear S2 is connected with third gear ring R3；They Shape design is: each planetary gear set of their design parameter and size seven speed automatic transmissions as described in final design Characteristic parameter determines；Wherein, the first sun gear S1, the second sun gear S2, third sun gear S3 be externally-engaged cylindrical gear, first Gear ring R1, the second gear ring R2, third gear ring R3 are internal spur gear, they can carry out position changing cutting and various corrections of the flank shape, Tip relief, the number of teeth and modulus of each gear such as can be required to determine at the design requirements by the strength of gear teeth, quality, noise and technique, tooth Taking turns accuracy class can determine that gear material can be selected according to service performance requirement and fabrication process condition and at original overall balance Steel alloy etc., can be through carburizing and quenching low-temperature tempering heat treatment；First planet carrier A1, third planet carrier A3 are both side plate and therebetween The space support frame of connecting plate composition, is disposed with planet wheel spindle and bearing etc. on both side plate；Second planet carrier A2 is unilateral side Board group at braced frame, planet wheel spindle and bearing etc. are disposed on side plate；

5 shifting elements by the first brake B1, second brake B2, first clutch C1, second clutch C2, Third clutch C3 composition；Their mutual relationships are: the gear of the first brake B1 connection first planet carrier A1 and seven is automatic Mission case 0；Second brake B2 connection third sun gear S3 and seven speed automatic transmission cabinets 0；First clutch C1 connects Meet the second planet carrier A2 and third sun gear S3；Second clutch C2 connection the first gear ring R1 and third planet carrier A3；Third from Clutch C3 connection the first gear ring R1 and the second planet carrier A2；Their shape design is: first clutch C1, second clutch C2, third clutch C3 are multiple-piece wet friction clutches, and multiple-piece wet friction clutch is commonly used on a kind of automobile Clutch pass through engagement selective between them to realize the work of transmitting torque it includes multiple groups antithesis piece and friction plate With；First brake B1, second brake B2 are multiple-piece wet friction brakes, and multiple-piece wet friction brake is one Common brake on kind automobile, it includes multiple groups antithesis piece and friction plates, are realized by engagement selective between them Stop the effect of transmitting torque；Certainly, the Clutch and brake in the present invention can be using except the clutch of multiple-piece wet friction The shifting element of other forms can also be used except device, multiple-piece wet friction brake, and organization plan is in power of the invention In benefit is advocated；

Power is via the route that seven speed automatic transmission is transmitted: power is from input shaft Input through as shown in Figure 1 Fluid torque-converter TC input, finally exported as third gear ring R3 to differential mechanism two sides output end Output and be transferred to described in outfit The driving wheel of the preposition precursor vehicle of seven speed automatic transmissions；

Second embodiment:

As shown in Figure 2: second embodiment is another applicable cases of seven speed automatic transmissions described in first embodiment, is claimed Be hybrid power transmission scheme.The structure of second embodiment and first embodiment are essentially identical, the difference is that using motor TM increases the 0th clutch C0 instead of fluid torque-converter TC.0th clutch C0 is arranged in the gear of input shaft Input and seven It is connected between the first axle 1 of automatic transmission and with them, motor TM is connected with the first axle 1 of seven speed automatic transmissions；

0th clutch C0 is for cutting off and connecting power provided by the engine of vehicle.When vehicle start or low speed row When sailing, motor TM operation, engine does not work, and opens the 0th clutch C0, disconnects engine and is connected by power with drive system；When Vehicle demand power is higher, is closed the 0th clutch C0, and vehicle can be by engine and motor while output power；When vehicle row Sailing operating condition is suitble to engine when working independently, and is closed the 0th clutch C0, closes motor TM, and vehicle is operated alone in engine；When When battery capacity is lower, by being closed the 0th clutch C0, the output power of engine is used to drive vehicle and passes through electricity simultaneously Machine TM is to cell power generation, or under operating condition of stopping, and the output power of engine by motor TM for being charged the battery；In addition this Mixed power plant, which can be realized, starts the duty of engine and Brake Energy recycling.

The shape design of each components is inside seven speed automatic transmission:

3 planetary gear sets (first planetary gear set PG1 (including the first sun gear S1, the first gear ring R1 and first Planet carrier A1), the second planetary gear set PG2 (including the second sun gear S2, the second gear ring R2 and second planet carrier A2), the third line Star gear set PG3 (including third sun gear S3, third gear ring R3 and third planet carrier A3)), (the first braking of 5 shifting elements Device B1, second brake B2, first clutch C1, second clutch C2, third clutch C3), seven speed automatic transmission cabinets 0, input shaft Input, the first axle 1 of seven speed automatic transmissions, the second axis 2 of seven speed automatic transmissions, the output of differential mechanism two sides The determination of the design parameter and size of Output is held to be identical with the first embodiment；

Design parameter and the size matching as corresponding to seven speed automatic transmissions of the motor TM and the 0th clutch C0 Arrangement and whole vehicle functions require determine, wherein motor TM be dc motor, AC three-phase inductive motor, switch The automotive electric motors of the types such as reluctance motor or permanent magnet brushless electromotor；0th clutch C0 can be used multi-disc rotating vane type and rub Clutch is wiped, multiple-piece wet friction clutch is common clutch on a kind of automobile, and it includes multiple groups antithesis piece and frictions Piece realizes the effect of transmitting torque by engagement selective between them；Certainly, the 0th clutch C0 can be using except more The shifting element of other forms except chip wet friction clutch, organization plan is in claims of the invention；

Power is via the route that seven speed automatic transmission is transmitted: power is from input shaft Input via motor TM Input is finally exported to differential mechanism two sides output end Output by third gear ring R3 and is transferred to outfit seven speed automatic transmission Preposition precursor vehicle driving wheel；

The present invention is not limited to the above embodiment the structures and methods mentioned, all those skilled in the art are without wound The equivalent transformation that the labour for the property made can be carried out will fall within the scope of protection of the present invention.

As shown in figure 3, shift logic illustrates how that realizing one using the combination of these shifting elements reverses gear and seven Forward gear.In shift logic figure, blank indicates that corresponding shifting element is in the open state, ● indicate corresponding shifting element In closed state.For each traveling gear, there are three being closed in five shifting elements, two are opened.

Further, it is closed by second brake B2, first clutch C1, second clutch C2, the first brake B1, the Three clutch C3 are opened, and automatic transmission becomes a gear speed ratio；Pass through the first brake B1, second brake B2, the second clutch Device C2 closure, first clutch C1, third clutch C3 are opened, and automatic transmission becomes second gear speed ratio；Pass through second brake B2, second clutch C2, third clutch C3 closure, the first brake B1, first clutch C1 are opened, and automatic transmission becomes Three gear speed ratios；Pass through the first brake B1, second brake B2, third clutch C3 closure, first clutch C1, the second clutch Device C2 is opened, and automatic transmission becomes four gear speed ratios；It is closed by second brake B2, first clutch C1, third clutch C3 It closes, the first brake B1, second clutch C2 are opened, and automatic transmission becomes five gear speed ratios；Pass through the first brake B1, first Clutch C1, third clutch C3 closure, second brake B2, second clutch C2 are opened, and automatic transmission becomes six gears speed Than；By first clutch C1, second clutch C2, third clutch C3 closure, the first brake B1, second brake B2 are beaten It opens, automatic transmission becomes seven gear speed ratios；It is closed by the first brake B1, second brake B2, first clutch C1, second Clutch C2, third clutch C3 are opened, and automatic transmission becomes reverse speed ratio.

As long as the position of each clutch and brake can be in this structure it should be noted that the component of connection is constant It requires to be adjusted according to engineering actual techniques, still in the scope of the claims of the present invention.

Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this In the scope of the claims of invention.

Claims (1)

1. a kind of seven speed automatic transmissions, it is characterised in that: it be by 3 planetary gear sets i.e. first planetary gear set (PG1), Second planetary gear set (PG2), third planet gear set (PG3)) and i.e. the first brake of 5 shifting elements (B1), the second system Dynamic device (B2), first clutch (C1), second clutch (C2), third clutch (C3)), seven speed automatic transmission cabinets (0), The first axle (1) of seven speed automatic transmissions, the second axis (2) of seven speed automatic transmissions form；Their mutual relationships are: 3 planetary gear sets, 5 shifting elements, the first axle (1) of seven speed automatic transmissions, seven speed automatic transmissions the second axis (2) It is arranged in the seven speed automatic transmissions cabinet (0), fluid torque-converter (TC) is arranged in input shaft (Input) and seven gear is automatic It is connected between the first axle (1) of speed changer and with them；0th clutch (C0) is arranged in input shaft (Input) and seven gears are automatic It is connected between the first axle (1) of speed changer and with them；Motor (TM) is connected with the first axle (1) of seven speed automatic transmission； Their shape design is: the seven speed automatic transmissions cabinet (0), the first axle (1) of seven speed automatic transmissions, the automatic change of seven gears The second axis (2), input shaft (Input), differential mechanism two sides output end (Output), the fluid torque-converter (TC), motor of fast device (TM) and the shape design of the 0th clutch (C0) is: their design parameter and size is as corresponding to seven speed automatic transmission Matched arrangement and whole vehicle functions require determine；Wherein fluid torque-converter (TC) selects the fluid power with blocking function to become Square device is to be used to reduce hydraulic losses brought by it；Motor (TM) is dc motor, AC three-phase inductive motor, switch One of reluctance motor and permanent magnet brushless electromotor；0th clutch (C0) is multiple-piece wet friction clutch, packet Containing antithesis piece and friction plate, the effect of transmitting torque is realized by combination selective between them；

3 planetary gear sets are by first planetary gear set (PG1), the second planetary gear set (PG2) and third planet gear Group (PG3) composition；Their correlation is: first planetary gear set (PG1), the second planetary gear set (PG2), third planet Gear set (PG3) is successively in the laterally spaced first axle (1) for being arranged in seven speed automatic transmission；

The first planetary gear set (PG1) includes the first sun gear (S1), the first gear ring (R1) and first planet carrier (A1)；Institute Stating the second planetary gear set (PG2) includes the second sun gear (S2), the second gear ring (R2) and the second planet carrier (A2)；The third Planetary gear set (PG3) includes third sun gear (S3), third gear ring (R3) and third planet carrier (A3)；They are mutual Relationship is: the longitudinally spaced arrangement of gear ring, planet carrier, sun gear of each planetary gear set, the first sun gear (S1) are fixed on In the first axle (1) of seven speed automatic transmissions, the second sun gear (S2) is placed in the first axle (1) of seven speed automatic transmissions, Third sun gear (S3) is placed in the first axle (1) of seven speed automatic transmissions；Their shape design is: their design ginseng Several and size is determined by the characteristic parameter of each planetary gear set of final design seven speed automatic transmission；Wherein, first too Sun wheel (S1), the second sun gear (S2), third sun gear (S3) are externally-engaged cylindrical gear；First gear ring (R1), the second gear ring (R2), third gear ring (R3) is internal spur gear；First planet carrier (A1), third planet carrier (A3) are for both side plate and therebetween Connecting plate composition space support frame, planet wheel spindle and bearing are disposed on both side plate；Second planet carrier (A2) is single The braced frame of side plate composition, is disposed with planet wheel spindle and bearing on side plate；

5 shifting elements are by the first brake (B1), second brake (B2), first clutch (C1), second clutch (C2), third clutch (C3) forms；Their mutual relationships are: the first brake (B1) connects first planet carrier (A1) With seven speed automatic transmission cabinets (0)；Second brake (B2) connects third sun gear (S3) and seven speed automatic transmission cabinets (0)；First clutch (C1) connects the second planet carrier (A2) and third sun gear (S3)；Second clutch (C2) connects the first tooth Enclose (R1) and third planet carrier (A3)；Third clutch (C3) connects the first gear ring (R1) and the second planet carrier (A2)；They Shape design is: first clutch (C1), second clutch (C2), third clutch (C3) are multiple-piece wet friction clutches Device, it includes antithesis pieces and friction plate, and the effect of transmitting torque is realized by combination selective between them；First braking Device (B1), second brake (B2) are multiple-piece wet friction brakes, and it includes antithesis pieces and friction plate, by them it Between selective combination realize the effect for stopping transmitting torque；

Power is via the route that seven speed automatic transmission is transmitted: power is from input shaft (Input) via the hydraulic moment changeable The input of one of device (TC) and motor (TM), is finally exported by third gear ring (R3) to differential mechanism two sides output end (Output) It is transferred to the driving wheel for being equipped with the preposition precursor vehicle of seven speed automatic transmission；

Pass through second brake (B2), first clutch (C1), second clutch (C2) closure, the first brake (B1), third Clutch (C3) is opened, which becomes a gear speed ratio；Pass through the first brake (B1), second brake (B2), Two clutches (C2) closure, first clutch (C1), third clutch (C3) are opened, which becomes second gear speed ratio； Pass through second brake (B2), second clutch (C2), third clutch (C3) closure, the first brake (B1), the first clutch Device (C1) is opened, which becomes three gear speed ratios；By the first brake (B1), second brake (B2), third from Clutch (C3) closure, first clutch (C1), second clutch (C2) are opened, which becomes four gear speed ratios；Pass through Second brake (B2), first clutch (C1), third clutch (C3) closure, the first brake (B1), second clutch (C2) it opens, which becomes five gear speed ratios；Pass through the first brake (B1), first clutch (C1), third clutch Device (C3) closure, second brake (B2), second clutch (C2) are opened, which becomes six gear speed ratios；Pass through One clutch (C1), second clutch (C2), third clutch (C3) closure, the first brake (B1), second brake (B2) It opens, which becomes seven gear speed ratios；Pass through the first brake (B1), second brake (B2), first clutch (C1) it is closed, second clutch (C2), third clutch (C3) are opened, which becomes reverse speed ratio；

By aforementioned, which can obtain seven forward gears and one reverses gear, and seven speed automatic transmission is each There are three shifting elements to be closed for gear, and two shifting elements are opened；In its shift logic, the shift between adjacent gear is whole Simply to shift gears, i.e., only one shifting element is opened by being closed into shift process, another shifting element is by being opened to Closure.